Robust magnet field homogeneity and detected signal-to-noise for transmission park position sensor applications

A technology of transmission and magnetic field sensor, which is applied in the direction of using electric/magnetic device to transmit sensing member, convert sensor output, instrument, etc.

Inactive Publication Date: 2020-02-28
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it may be difficult to constrain the rotation of the magnetic materials and the axial tilt of the magnetic field polarization of these magnetic materials to such an extent that the transmission position sensor has a sufficiently low probability of accurately detecting the position of the magnetic materials

Method used

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  • Robust magnet field homogeneity and detected signal-to-noise for transmission park position sensor applications
  • Robust magnet field homogeneity and detected signal-to-noise for transmission park position sensor applications
  • Robust magnet field homogeneity and detected signal-to-noise for transmission park position sensor applications

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Embodiment Construction

[0035]Reference will now be made in detail to several embodiments of the present disclosure which are illustrated in the accompanying drawings. Wherever possible, the same or similar reference numerals are used in the drawings and the description to denote the same or similar components or steps. The drawings are in simplified form and not to exact scale. For convenience and clarity, directional terms such as top, bottom, left, right, up, upper, above, below, below, rear and forward may be used with respect to the drawings. These and similar directional terms should not be construed as limiting the scope of the present disclosure.

[0036] Example embodiments are provided so that this disclosure is thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth, such as examples of specific components, devices and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent ...

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Abstract

An electronic transmission range selection (ETRS) system for a motor vehicle transmission includes an ETRS housing disposed on the transmission, the ETRS housing having a magnetic field sensor in communication with a transmission controller; and a magnetic field source including a magnet component and a high magnetic permeability component. The magnetic field source disposed on a transmission selector shaft, the magnetic field source detectable by the magnetic field sensor at a plurality of predetermined positions along a movement path of the transmission selector shaft; and the magnetic fieldsensor detecting magnetic flux generated by the magnetic field source, and communicating magnetic field source position information to the controller. The high magnetic permeability component homogenizes the magnetic flux generated by the magnet component and the controller generates an electronic transmission mode signal based on the magnetic field source position information.

Description

technical field [0001] The present disclosure relates generally to motor vehicles, and more particularly, to gear selection sensors for motor vehicle transmissions. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Many vehicles prevent or allow operation of certain functions when the vehicle's transmission is in the out-of-park position. For example, the engine ignition system can be disabled in the out-of-park position. To determine whether the transmission is in the out-of-park position, the vehicle may be equipped with a transmission position sensor that senses the position of one or more components of the transmission control system. The position of the transmission may be communicated to one or more vehicle controllers to enable or disable various vehicle functions as appropriate. Gear selection sensors for motor vehicle transmissions typical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/02F16H59/08F16H61/02F16H61/28
CPCF16H59/02F16H59/08F16H61/0204F16H61/0213F16H61/28F16H2059/0221F16H59/105G01D5/145G01D5/20
Inventor S·R·瓦格纳T·A·佩里D·T·斯塔克
Owner GM GLOBAL TECH OPERATIONS LLC
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